Last-supporting jack



(No Model.) 3 Sheets-Sheet 1.

H. STOCKMAN.

LAST SUPPORTING JACK. No. 340,063. Patented Apr. 13, 1886.

3 Sheets-Sheet 2.

(No Model.)

H. STOCKMAN.

LAST SUPPORTING JAGK.

Patented Apr. 13, 1886.

lay

3 Sheets-Sheet 3.

(NoModeL) H. STOOKMAN.

LAST SUPPORTING JACK.

No. 340,063. Patented Apr. 13, 1886.

UNITED STATES PATENT OFFICE.

HENRY STOOKMAN, OF PHILADELPHIA, PENNSYLVANIA.

LAST-SUPPORTING JACK.

SPECIFICATION forming part of Letters Patent No. 340,063, dated April 13, 1886.

Application filed Novemherli, 1885. Serial No. 183,956. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY STOCKMAN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Jacks, of which the following is a specification, reference being bad therein to the accompanying drawings.

My invention relates to last supporting jacks for shoe-makers use, andhas for its object the provision of means for throwing the jack-body and its contained last into different positions for convenience to the operator,and in means employed to secure it from displacement therefrom.

To these ends the invention comprises, in

connection,a sub-base secured to the bench or table, a base that supports the last-holding jack, a hinged connection between the base and sub-base which allows the base to be turned either to the right or left, and means for holding said base in fixed position at any desired point.

' In addition to the above-described adjustment, I provide that the jack-body shall be loosely connected to the base, so as to turn freely upon a central pivot thereon in a plane of motion at right angles to the plane of motion of the base without reference to the position occupied by the sub-base, and means for securing said jack-body at different desired points of adjustment upon the base.

The invention further contemplates the provision of means which,used in connection with the jack-body, allow a last to be instantly placed in position upon or removed from said jack-body, and in means for holding the last securely in position when in use.

The invention above set forth is hereinafter fully described,and specifically pointed out in the claims.

In the accompanying drawings,which form a part of this specification, Figure 1 is a side elevation of a jack embodying my improvements. Fig. 2 is an elevation of the opposite side of the jack. Fig. 3 represents an end elevation thereof. Fig. 4 is a longitudinal section through thejack and its attachments. Fig. 5 is a transverse section of Fig. 1, showing the base and its attached jack-b0dy turned to the right. Fig. 6 is a similar sectional view, the

base and its attached jack-bod y turned to the left. Fig. 7 is a top plan view of the sub-base. Fig. 8 is a bottom plan view thereof. is a top plan view of the base. Fig. 10 is a bot-tom plan view thereof. Figs. 11 and 12 are detail views of parts of the jack-body; and Figs. 13 and 14 represent modified forms of the pivoted supportingbar of the base.

Referring to the drawings, in which similar letters of reference denote similar parts, A designates the sub-base, consisting of a. thin plate, a, of metal, provided at its side and end edges with downwardly-projecting flanges a, that bear upon the bench or table.

a designates a slot formed at the middle of the sub-base for the passage of a locking-bar, B, pivoted to the base, as hereinafter described.

a a designate lugs projecting from the lower surface of the subbase at each side of the slot a. I provide the lugs a with screwthreaded apertures a, that receive the screwthreaded inner end of a rod, 0, that extends thence below the part a through the flange a, and is provided upon its outer end with a winged head, 0, to operate the rod. The rod 0 serves to secure the bar B at different desired points within the slot a and to this end the inner end of the rod may either bear against the bar B or said bar may be perforated to receive the end of the r0d,as shown in Fig. 14.

a a designate apertured lugs projecting from the upper surface of the sub-base, at one side thereof, to which is pivotally connected by a rod, d, one end of a frame, D, the oppo site end of which is pivoted to the base E.

Fig. 9 p

The frame D is in length equal to the width of go the sub-base, and consists in side rails, d, and transverse rails d. Apertured lugs (1, formed on the ends of said frame afford passage to the rods by which it is connected to the base and sub-base, respectively.

E designates the base, consisting of a thin plate, 6, of metal, provided at its edges with a downwardly-proj ecting flange, 6', which rests upon the sub-base.

e designates an aperture formed at the middle of the base, to receive the shank of a screwthreaded bolt, F, which secures thejack-body to the base, as hereinafter described. The head f of the bolt]? is square in crossscction,

IOI)

is held within a socket, 0, formed by flanges e upon the lower surface of the base at each side of the aperture 6 and is provided with downward] y-projecting lugs f between which is pivotedthe upper end of the adjusting-bar B.

e designates strengthening-ribs formed upon the lower surface of the plate 0. The flange e of the base is cut away at its sides 6 6 for the reception of the frame I), one end of which is pivoted by a bolt, 6 within the cut-away portion 6 of the flange 6'.

By reference to Figs. 5 and 6 it will be observed that the above-described hinged connect ion between the base and sub-base permits the turning of said base either to the right or left, the respective ends of the frame D becoming in turn the pivotal point of the base.

I secure the jack-body to the base E in the following described manner, viz:

e designates a circular rib formed upon the upper surface of the base E, and this rib has for its center the aperture 0 and fits into a circular groove, 9, formed in the bottom of the jack-body G. The groove 9 hasfor its center an aperture, 9', formed through said j ack-body at the middle thereof. The upper threaded end of the bolt F projects through the aperture g, and through a boss, projecting from the upper surface of the jack-body about said aperture. The boss 9 is provided upon its upper surface with cam-faces g, which engage similar cam-faces, it, formed upon the lower surface of the apertured head of a cam-lever, H, placed upon the upper end of the bolt F.

F designates an adjusting-nut upon the bolt above the lever.

By operating the lever H the jack-body may be firmly secured at any point of its plane of motion, as will be readily understood.

The jack-body Gcomprises a base, G, a toestandard, G", having a ridge, 9*, at its lower end, and a fixed heel-standard, G, having a .rounded upper end, 9 and a transverse aperture, g.-

I designates a swinging heelstandard having a bifurcatedlower end, the parts i of which extend at each side of the standard G, and are provided with square apertures i, to receive the squared portion ofv a lever, J, journaled in the aperture 5 of the standard Gt. The upper end of the swinging standard I is provided with an aperture to receive a removable pin,

i", which is held in'place by a set-screw, i".

The lever-arm J is provided at its free end with aslot, through which projects from the jack-body a screw-threaded bolt, K, whereby any desired degree of tension may be imparted to a spiral spring, K, interposed upon bolt K, between the thumb-nut 7c and lever J. The spring K operates to hold the free end of the lever J against the upper surface of the jack-body, and through said lever the upper end of the swingingstandard forward in the position shown in Fig. 1, whereby the toe of a last placed upon said standard will bear firmly upon an adjustable toe rest or block, L, having a bifurcated lower end, the partsl of whichextend at the sides of and engage with vertical grooves m, formed in the sides of a casting, M, having a sleeved lower end, m, which fits upon the toe-standard G, and aslot,

m that engages the rib g at foot of Said standreceive a removable pin similar to that employed in connection with the swinging standard I or said standard may be enlarged longitudinally and operate in lieu of the casting M, and be provided with'a series of apertures to receive an adjustable toe rest.

I do not limit myself to the exact construction of parts herein shown and described,-as I am aware that variousmodifications may be made therein without departing from the spirit or sacrificing the advantages thereof as, for instance, a spring-pin may be used to secure the bar B in lieu of the bar 0.

'No claim is broadly made herein for the construction of the lever J with the swinging heel-support I; as such matter is broadly claimed in my application filed September 29, 1885, Serial No. 178,571.

' I claim 1. A last-holding jack having a sub-base secured to a suitable support, a base mounted thereon, and a frame interposed between and f hinged, respectively, to the base and sub-base, substantially as described.

2. In a last-holding jack, a sub-base secured to a suitable support, a base mounted thereon, a frame interposed between and hinged, respecti vel y, to said base and sub-base, and apivoted holding-bar, substantially as described.

3. In a last-holding jack, asub-base'secured to a suitable support, abasemounted thereon, a frame interposed between, extending trans versely of and hinged at its opposite ends to the base and sub-base, respectively, a holdingbar pivoted to the base and extending through as described. p I

4. In a last-holding jack, asub-base secured to a suitable support, a base mounted thereon, and a frame interposed between and pivotally connected at its opposite ends to the base and sub-base, in combination with a jack-bodyhaving its plane of motion at right angles to.

the plane of motion of the base, substantially as described.

5. In a last-holding jack, and .in combina-j tion, a sub-base secured to a suitable support, a base mounted thereon, a frame interposed between and pivotally connected at its opposite ends to the base and sub-base,-respectively, a holding-bar pivoted at its top to the base, and a last-holding jack-body having toe and heel supporting standards and lockinglever, substantially asdescribed.

4 6. In a last-holding jack, a sub-base secured to a suitable support and provided at its middle with an aperture to receive the base-holding bar, and lugs to receive a locking-rod, in combination with a base having an apertnred no the sub-base, and a locking-bar, substantially middle to secure theholding-bar, and a frame interposed between and hinged at its opposite ends to the base and sub-base, respectively, substantially as described.

7. The combination, in a last-holding jack having a plane of motion at right angles to the plane of motion of its base and provided with a toe-standard and apertured heel-standard, of a removable swinging heel-standard having a bifurcated lower end, its operatinglever, which determines the pressure, and the tension-spring, substantially as described.

8. In a last-holding jack, the combination of ajack-body having a fixed heel-standard provided with a transverse aperture, with a swinging heel-standard having a removable last-receiving pin, a bifurcated lower end having apertures, and a spring-controlled lever which determines the pressure with which the last is held in position, substantially as described.

9. In a last-holding jack, a jack-body provided with a fixed toe-supporting standard] having an adjustable toe-support, a fixed heelsupporting standard having a swinging heelsupport, and a tension-regulating lever, in combination with a base, a sub-base, a frame interposed between and hinged at its opposite ends to the base and Sublease, respectively, and the base holding-bar and locking-rod, substantially as described.

10. In a last-holding jack, and in combina tion, a sub-base, A, having upwardly-projecting lugs on one side thereof, ahinged connection, as D, pivoted at one end to said lugs and at its opposite end to the opposite side of the base E, a holding-bar, B, a locking-rod, O, a centrally-pivoted jack-body, G, having camface g, and a cam-lever, H, substantially as described.

In testimony whereof I affix my signaturein presence of two witnesses.

HENRY STOCKMAN.

\Vitnesses:

J OHN CALDWELL, ROBERT BAIRD. 

